Upgrade your competition or training pistol with XS Sights Glock Fiber Optic Sights precision CNC-machined steel components, a serrated rear sight, and a bright green fiber optic front insert designed for fast sight acquisition, precise alignment, and easy installation. Ideal for range practice, competition, or your first sight upgrade. Product Details Green fiber optic front: Bright and easy to see in bright light. Serrated rear sight: Prevents glare and reduces distractions for improved front-sight focus. Fitment: Fits Glock generations 1 5; compatible with Glock MOS models. Replaceable: User-replaceable fiber optic insert for easy maintenance and customization. Material & manufacture: Steel, CNC-machined for precision. Use case: Built for competition and training fast acquisition and precise alignment. Includes: Front sight with fiber installed (where applicable) and installation instructions.